﻿<!DOCTYPE html>
<html>
<head>
  <title>Beat Paths</title>
  <!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
  <meta name="description" content="A precedence diagram showing a hierarchical relationship between nodes, using archetypeNodeData, LayeredDigraphLayout, and Bezier curved links." />
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;  // for conciseness in defining templates

      // Must name or refer to the DIV HTML element
      myDiagram =
        $(go.Diagram, "myDiagramDiv",
          { // automatically scale the diagram to fit the viewport's size
            initialAutoScale: go.Diagram.Uniform,
            // disable user copying of parts
            allowCopy: false,
            // position all of the nodes and route all of the links
            layout:
              $(go.LayeredDigraphLayout,
                {
                  direction: 90,
                  layerSpacing: 10,
                  columnSpacing: 15,
                  setsPortSpots: false
                })
          });

      // replace the default Node template in the nodeTemplateMap
      myDiagram.nodeTemplate =
        $(go.Node, "Vertical",  // the whole node panel
          $(go.TextBlock,  // the text label
            new go.Binding("text", "key")),
          $(go.Picture,  // the icon showing the logo
            // You should set the desiredSize (or width and height)
            // whenever you know what size the Picture should be.
            { desiredSize: new go.Size(75, 50) },
            new go.Binding("source", "key", convertKeyImage))
        );

      // replace the default Link template in the linkTemplateMap
      myDiagram.linkTemplate =
        $(go.Link,  // the whole link panel
          { curve: go.Link.Bezier, toShortLength: 2 },
          $(go.Shape,  // the link shape
            { strokeWidth: 1.5 }),
          $(go.Shape,  // the arrowhead
            { toArrow: "Standard", stroke: null })
        );

      // the array of link data objects: the relationships between the nodes
      var linkDataArray = [
        { from: "CAR", to: "ARI" },
        { from: "ARI", to: "CIN" },
        { from: "ARI", to: "GB" },
        { from: "DEN", to: "GB" },
        { from: "DEN", to: "CIN" },
        { from: "DEN", to: "NE" },
        { from: "GB", to: "WAS" },
        { from: "WAS", to: "STL" },
        { from: "CIN", to: "STL" },
        { from: "STL", to: "SEA" },
        { from: "SEA", to: "SF" },
        { from: "SEA", to: "MIN" },
        { from: "NE", to: "NYG" },
        { from: "NE", to: "KC" },
        { from: "MIN", to: "DET" },
        { from: "MIN", to: "KC" },
        { from: "KC", to: "HOU" },
        { from: "KC", to: "BUF" },
        { from: "KC", to: "BAL" },
        { from: "KC", to: "OAK" },
        { from: "BUF", to: "NYJ" },
        { from: "BAL", to: "PIT" },
        { from: "DET", to: "NO" },
        { from: "DET", to: "PHI" },
        { from: "DET", to: "CHI" },
        { from: "HOU", to: "JAC" },
        { from: "HOU", to: "TEN" },
        { from: "PIT", to: "IND" },
        { from: "PIT", to: "SD" },
        { from: "OAK", to: "NYJ" },
        { from: "OAK", to: "SD" },
        { from: "NO", to: "ATL" },
        { from: "NO", to: "NYG" },
        { from: "PHI", to: "NYG" },
        { from: "CHI", to: "TB" },
        { from: "NYJ", to: "IND" },
        { from: "NYJ", to: "CLE" },
        { from: "IND", to: "TB" },
        { from: "TB", to: "ATL" },
        { from: "SD", to: "CLE" },
        { from: "ATL", to: "DAL" },
        { from: "ATL", to: "JAC" },
        { from: "CLE", to: "TEN" },
        { from: "DAL", to: "MIA" },
        { from: "MIA", to: "TEN" }
      ];

      // create the model and assign it to the Diagram
      myDiagram.model =
        $(go.GraphLinksModel,
          { // automatically create node data objects for each "from" or "to" reference
            // (set this property before setting the linkDataArray)
            archetypeNodeData: {},
            // process all of the link relationship data
            linkDataArray: linkDataArray
          });
    }

    function convertKeyImage(key) {
      if (!key) key = "NE";
      return "https://www.nwoods.com/go/beatpaths/" + key + "_logo-75x50.png";
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; margin: 10px; height: 700px"></div>
  <p>
  This sample demonstrates reading JSON data describing the relative rankings of NFL teams
  during the 2015 season and generating a diagram from that data.
  The ranking information came from beatgraphs.com.
  </p>
  <p>
  The JSON data is basically just a list of relationships.
  Unlike most model data, there are no elements describing the nodes --
  the node definitions are implicit in the references from the links.
  Hence the <a>Diagram.model</a> has <a>GraphLinksModel.archetypeNodeData</a> set to a JavaScript object.
  </p>
  <p>
  The node template uses the <b>convertKeyImage</b> function to convert the team name
  into a URI referring to an image on our web site.
  </p>
</div>
</body>
</html>
